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Diesel or Petrol?

What are her requirements then? You've only said so far "diesel because I like Audi A6s". Not much to go on is it. :p

Cars aren't always totally rational though. My last few motors have been bought with pure practicality in mind and whilst they've done the job, driving some nice can be fun (assuming you don't mostly do town driving)
 
That sounds grim.

They don't look too bad:

FordMondeoEstate0215(7).jpg




Aston Martin style grill.

Still, wife-beater motors.
 
Fair enough, I'm happy to stand corrected. I can't afford to drive new cars anyway. 0 to 60 in 11 seconds isn't awful, but it's not exciting either.
 
New diesels are fitted with a Diesel Particulate Filter which actually incinerates the little nasties while you're operating at near-motorway speeds. Clever stuff!

I'll always hold a fond place in my heart for a good old 80s 236ci Perkins spewing out all manor of gorgeous smells as it chugs off down the road ❤

Dpf's are prone to early failure if used for lots of short journeys. In days of old, diesals had glow plugs which you had to warm up before being able to start the engine.

Me, committed petrol head.
 
In days of old, diesals had glow plugs which you had to warm up before being able to start the engine.

don't they now?

:eek:

mine does - although i've had it 20 years...

and having said that, when i had a loan car a couple of years ago - which was the first petrol car i'd driven since i got current car - my first question was 'where's the choke?' :facepaw:
 
Yeah they still have glow plugs, but you don't have to wait very long unless it's super cold. In fact a lot of the time they don't even get used, I think.
 
Nothing wrong with glow plugs, I would get into my 218SLD Turbo, put my key in the ignition and by the time I had put on my seatbelt the engine was ready to start, and it always started immediately.
 
Glow plugs stop you from killing the battery by relentless cranking, specially on fucked old diesels in the cold. DPF need caning to clean them out - most people chug around the city at 15mph for years and shit their pants when presented with a 4 fig bill for a new DPF. A 15 minute motorway run every month or two starts the cleaning process on modern particulate filters
 
About five years ago a friend of mine (who has a PhD in mechanical engineering so probably knew what he was talking about) said he would not buy a diesel car. His argument was that not only are they more expensive to buy, but they need more maintenance (oil and filters need changing at least twice a year) than a petrol doing similar mileage. He also said that they are more polluting in terms of particulates and soot, if not through other pollutants. In his opinion it was better to buy a well looked after, if slightly older, petrol car as this would be cheaper all round.
 
Glow plugs stop you from killing the battery by relentless cranking, specially on fucked old diesels in the cold. DPF need caning to clean them out - most people chug around the city at 15mph for years and shit their pants when presented with a 4 fig bill for a new DPF. A 15 minute motorway run every month or two starts the cleaning process on modern particulate filters
Yep, although it can be very pernickety about when it carries it out.

DPFs aren't the only problem though. Things like EGR valves, swirl flaps etc add extra complication to diesels. So does the simple presence of a turbo. More big ticket items to fail.

However you have to compare like for like, and as you can see, lots of petrols are now turbocharged (and have increasingly complicated pollution control systems) so you may not be escaping much.

I think diesel is going to become more of a problem, but the battle's not over. When pushed they might find ways to clean it up some more, as they have in this phase with AdBlue. If I had to bet though I'd bet against it being disincentived sooner rather than later.
 
So, it's narrowed down to an A6 3ltr bi-turbo diesel, or an S6 4ltr petrol - what would be best for a middle-aged midget woman to run the kids to school in and take the dog for a walk with?
 
Many years ago a motor company was asked to make a multi-fuel engine for a British tank. They failed to deliver ontime so a dedicated engine was used. However many diesels have the capacity to run on vegetable oil or chip fat rather than neat diesel. Something to be said for that, come the revolution!
 
So, it's narrowed down to an A6 3ltr bi-turbo diesel, or an S6 4ltr petrol - what would be best for a middle-aged midget woman to run the kids to school in and take the dog for a walk with?
If she really is a midget woman, will she be able to reach the pedals?
 
One unexpected issue has plagued a mate with a D5 v70 - rough running & going into limp mode at high speed.

After about six months of trying to find the fault, turns out to be the pressurised engine mounts that take a feed from the turbo system and pump up the mounts to alleviate the vibration inherent in a diesel setup were perished and leaking at high revs ....bet you didn't know about that.....

So although the derv in its simplest form is almost caveman like, the other gubbins that go along with it are where you will have problems
 
turns out to be the pressurised engine mounts that take a feed from the turbo system and pump up the mounts to alleviate the vibration inherent in a diesel setup were perished and leaking at high revs ....bet you didn't know about that.....
Indeed! Never heard of such a thing.
 
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